Grade 630 stainless steels have good corrosion resistance in many environments. They exhibit improved resistance against stress corrosion cracking, if aged at 550°C or more. However, grade 630 steels are less resistant to solution treated Condition A, and hence these steels, even with considerable hardness, should not be used in this condition.
| Carbon | 0.07 max |
| Chromium | 15 – 17.5 |
| Copper | 3 – 5 |
| Iron | Balance |
| Manganese | 1 max |
| Nickel | 3 – 5 |
| Niobium | 0.15 – 0.45 |
| Niobium+Tantalum | 0.15 – 0.45 |
| Phosphorus | 0.04 max |
| Silicon | 1 max |
| Sulphur | 0.03 max |
For Medical and dental applications, we provide precipitation hardening stainless steel materials
AISI 630, 17-4PH, EN 1.4542, AISI 631, 17-7PH, EN 1.4568, and XM-16, alloy 455, EN 1.4543
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